<template>
    <div>
        <!--面包屑导航区域-->
        <el-breadcrumb separator-class="el-icon-arrow-right">
        <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
        <el-breadcrumb-item>权限管理</el-breadcrumb-item>
        <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!--卡片视图-->
        <el-card>
            <!--添加角色按钮区域-->
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addRoleVisible = true">添加角色</el-button>
                </el-col>
            </el-row>

            <!--角色列表区域-->
            <el-table :data="roleList" border stripe>
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop': '','vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!--渲染一级权限-->
                            <el-col :span="5">
                                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!--渲染二级和三级权限-->
                            <el-col :span="19">
                                <!--通过for 循环 嵌套渲染二级权限-->    
                                <el-row :class="[i2 === 0 ? '': 'bdtop','vcenter']" v-for="(item2, i2) in item1.children" :key="item2.id" >
                                    <el-col :span="6">
                                        <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                        <i class="el-icon-caret-right"></i>
                                    </el-col>
                                    <el-col :span="18">
                                        <el-tag v-for="(item3, i3) in item2.children" :key="item3.id" type="warning" closable @close="removeRightById(scope.row, item3.id)">{{item3.authName}}</el-tag> 
                                    </el-col>
                                </el-row>
                            </el-col> 
                        </el-row>
                    </template>
                </el-table-column>
                <!--索引列-->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                    <el-button type="primary" size="mini" icon="el-icon-edit" @click="showEditDialog(scope.row.id)">编辑</el-button>
                    <el-button type="danger" size="mini" icon="el-icon-delete" @click="removeByUserId(scope.row.id)">删除</el-button>
                    <el-button type="warning" size="mini" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!--添加角色对话框区域-->
        <el-dialog title="添加角色" :visible.sync="addRoleVisible" width="50%" @close="addRoleClosed">
            <!--内容主体区域-->
            <el-form :model="addRole" :rules="addRoleRules" ref="addRoleRef" label-width="80px" class="demo-ruleForm">
            <el-form-item label="角色名称" prop="roleName">
                <el-input v-model="addRole.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="addRole.roleDesc"></el-input>
            </el-form-item>
            </el-form>
            <!--底部区域-->
            <span slot="footer" class="dialog-footer">
            <el-button @click="addRoleVisible = false">取 消</el-button>
            <el-button type="primary" @click="addRoleForm">确 定</el-button>
            </span>
        </el-dialog>

        <!--修改角色对话框区域-->
        <el-dialog title="修改角色" :visible.sync="editRoleVisible" width="50%" @close="editRoleClosed">
            <!--内容主体区域-->
            <el-form :model="editRole" :rules="editRoleRules" ref="editRoleRef" label-width="80px" class="demo-ruleForm">
            <el-form-item label="角色名称" prop="roleName">
                <el-input v-model="editRole.roleName"></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="editRole.roleDesc"></el-input>
            </el-form-item>
            </el-form>
            <!--底部区域-->
            <span slot="footer" class="dialog-footer">
            <el-button @click="editRoleVisible = false">取 消</el-button>
            <el-button type="primary" @click="editRoleForm()">确 定</el-button>
            </span>
        </el-dialog>

        <!--分配权限的对话框-->
        <el-dialog
        title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
        <!--树形控件-->
        <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" 
        default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
        <span slot="footer" class="dialog-footer">
            <el-button @click="setRightDialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="allowRights">确 定</el-button>
        </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data() {
        return {
            //所有角色列表数据
            roleList: [],
            addRoleVisible: false,
            editRoleVisible: false,
            addRoleRules: {
              roleName: [
                  {required: true, message:'请输入角色名称', trigger: 'blur'},
                  {min:3 ,max:15, message:'请输入3-15位字符', trigger: 'blur'}
                  ],
              roleDesc: {required: true, message:'请输入角色描述', trigger: 'blur'}
            },
            addRole: {
                roleName: '',
                roleDesc: ''
            },
            editRole: {},
            editRoleRules: {
              roleName: {required: true, message:'请输入角色名称', trigger: 'blur'},
              roleDesc: {required: true, message:'请输入角色描述', trigger: 'blur'}
            },
            setRightDialogVisible: false,
            //所有权限的数据
            rightsList: [],
            //树形控件树形绑定对象
            treeProps: {
                label: 'authName',
                children: 'children'
            },
            // 默认选中的节点Id值数组
            defKeys: [],
            // 当前即将分配权限的id
            roleId: ''
            
        }
    },
    created() {
        this.getRoleList()
    },
    methods: {
        async getRoleList() {
        const {data:res} = await this.$axios.get('roles')
        if (res.meta.status !== 200) {
            return this.$message.error('获取用户列表失败')
        }
        this.roleList = res.data
        console.log(res.data)
        },
        addRoleClosed() {
            this.$refs.addRoleRef.resetFields();
        },
        addRoleForm() {
            this.$refs.addRoleRef.validate(async valid => {
                if (!valid) return
                const {data : res} = await this.$axios.post('/roles', this.addRole)
                console.log(res)
                if (res.meta.status !== 201){
                    return this.$message.error('添加角色失败')
                }
                this.$message.success('添加角色成功')
                //隐藏对话框
                this.addRoleVisible = false
                //重新获取角色列表数据
                this.getRoleList()
            })
        },
        editRoleClosed() {
            this.$refs.editRoleRef.resetFields();
        },
        editRoleForm(id) {
            this.$refs.editRoleRef.validate(async valid => {
                if (!valid) return
                const {data : res} = await this.$axios.put('roles/'+ this.editRole.roleId,{
                    roleName: this.editRole.roleName, roleDesc: this.editRole.roleDesc})
                if( res.meta.status !==200 ){
                    return this.$message.error('编辑用户失败')
                } 
                this.$message.success('编辑用户成功')
                // 隐藏对话框
                this.editRoleVisible = false
                // 重新获取列表数据
                this.getRoleList()
            })
        },
        async showEditDialog(id) {
            const { data:res } = await this.$axios.get('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('查询角色信息失败')
            }
            this.editRole = res.data
            console.log(res.data)
            //展示编辑角色的对话框
            this.editRoleVisible = true
        },
        async removeByUserId(id) {
            // 询问用户是否删除数据
            const confirmResult = await this.$confirm('此操作会永久删除该角色, 是否继续?', '温馨提示', 
            {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }
            ).catch(err => err)
            //如果用户确认删除，则返回值为字符串 confirm
            //如果用户取消了删除，则返回值为字符串 cancel
            // console.log(confirmResult)
            if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
            }
            const { data:res } = await this.$axios.delete('roles/' + id)
            if (res.meta.status !== 200) {
                return this.$message.error('删除用户失败')
            }
            this.$message.success('删除用户成功')
            this.getRoleList()
        },
        // 根据id删除对应的权限 
        async removeRightById(role, rightId) {
            //弹框是否要删除
            const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
            }).catch(err => err)
            if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
            }
            const {data:res} = await this.$axios.delete(`roles/${role.id}/rights/${rightId}`)
            if (res.meta.status !== 200) {
                return this.$message.error('删除权限失败')
            }
            // 会把页面重新渲染一遍，把其打开的权限再次关闭
            // this.getRoleList()
            role.children = res.data
        },
        // 展示分配权限的对话框
        async showSetRightDialog(role) {
            this.roleId = role.id
            // 获取所有权限的数据
        const {data:res} = await this.$axios.get('rights/tree')
            if(res.meta.status !== 200) {
                return this.$message.error('获取权限数据失败')
            }
            // 把获取到的权限数据保存到 data中
            this.rightsList = res.data
            
            //递归获取三级节点
            this.getLeafKeys(role, this.defKeys)

            this.setRightDialogVisible = true 
        },
        // 通过递归的形式，获取角色下所有的三级权限的id，并保存到数组中
        getLeafKeys(node, arr) {
            // 如果当前节点不包含children属性，则是三级节点
            if (!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach(item => this.getLeafKeys(item, arr))
        },
        // 监听对话框的关闭事件
        setRightDialogClosed() {
            this.defKeys = []
        },
        // 为角色分配权限
        async allowRights() {
            const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            // console.log(keys)
            const idStr = keys.join(',')
            const {data: res} = await this.$axios.post(`roles/${this.roleId}/rights`,{rids: idStr})

            if (res.meta.status !== 200) {
                return this.$message.error('分配权限失败')
            }
            this.$message.success('分配权限成功')
            this.getRoleList()
            this.setRightDialogVisible = false
        }

    }
}
</script>

<style lang="less" scoped>
.el-tag{
    margin: 7px;
}

.bdtop{
    border-top: 1px solid #eee;
}

.bdbottom{
    border-bottom: 1px solid #eee;
}

.vcenter{
    display: flex;
    align-items: center;
}
</style>